*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        :root {
            --primary: #1a3a5c;
            --primary-light: #2a5a8c;
            --accent: #f0a830;
            --accent-light: #f7c86a;
            --bg: #f5f7fa;
            --bg-card: #ffffff;
            --text: #1e2a3a;
            --text-light: #4a5a6a;
            --border: #d0d8e0;
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
            --radius: 16px;
            --radius-sm: 10px;
            --font: 'Segoe UI', Roboto, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
            --max-width: 1120px;
            --header-bg: #0f1a2b;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: var(--accent);
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: var(--header-bg);
            color: #fff;
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 2px 16px rgba(0, 0, 0, 0.25);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 12px 20px;
            max-width: var(--max-width);
            margin: 0 auto;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 1.6rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: #fff;
            background: linear-gradient(135deg, var(--accent), #ffc857);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            transition: opacity 0.2s;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .my-logo:hover {
            opacity: 0.85;
            text-decoration: none;
        }
        .my-logo i {
            -webkit-text-fill-color: var(--accent);
            font-size: 1.4rem;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.6rem;
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 6px;
            transition: background 0.2s;
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        .nav-menu {
            display: flex;
            gap: 24px;
            align-items: center;
            flex-wrap: wrap;
        }
        .nav-menu a {
            color: #cfddee;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 6px 0;
            border-bottom: 2px solid transparent;
            transition: color 0.2s, border-color 0.2s;
        }
        .nav-menu a:hover {
            color: var(--accent);
            border-bottom-color: var(--accent);
            text-decoration: none;
        }
        .nav-menu a.active {
            color: #fff;
            border-bottom-color: var(--accent);
        }
        .breadcrumb-wrap {
            background: #eaeef3;
            padding: 10px 20px;
            font-size: 0.85rem;
            border-bottom: 1px solid var(--border);
        }
        .breadcrumb-wrap .container {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 6px;
        }
        .breadcrumb-wrap a {
            color: var(--primary-light);
        }
        .breadcrumb-wrap span {
            color: var(--text-light);
        }
        .breadcrumb-wrap .sep {
            color: #9aabbb;
            margin: 0 2px;
        }
        .main-content {
            padding: 40px 0 60px;
        }
        .main-content .container {
            max-width: 820px;
        }
        .hero-img {
            margin-bottom: 32px;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            background: #dce3ec;
            overflow: hidden;
        }
        .hero-img img {
            width: 100%;
            object-fit: cover;
            min-height: 200px;
            background: #c0cbd8;
        }
        .hero-img figcaption {
            padding: 10px 16px;
            font-size: 0.85rem;
            color: var(--text-light);
            background: #f0f3f7;
            border-top: 1px solid var(--border);
        }
        h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 12px;
            color: var(--primary);
            letter-spacing: -0.5px;
        }
        h2 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-top: 48px;
            margin-bottom: 16px;
            color: var(--primary);
            border-bottom: 3px solid var(--accent);
            padding-bottom: 8px;
        }
        h3 {
            font-size: 1.35rem;
            font-weight: 600;
            margin-top: 32px;
            margin-bottom: 10px;
            color: var(--primary-light);
        }
        h4 {
            font-size: 1.1rem;
            font-weight: 600;
            margin-top: 24px;
            margin-bottom: 8px;
            color: var(--text);
        }
        p,
        li {
            font-size: 1.05rem;
            color: var(--text);
            margin-bottom: 16px;
        }
        ul,
        ol {
            padding-left: 28px;
            margin-bottom: 20px;
        }
        li {
            margin-bottom: 6px;
        }
        .highlight {
            background: #fdf6e3;
            padding: 2px 8px;
            border-radius: 4px;
            font-weight: 600;
        }
        .emoji-big {
            font-size: 1.3rem;
        }
        .block-tip {
            background: #e8f0fe;
            border-left: 5px solid var(--primary-light);
            padding: 18px 22px;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin: 24px 0;
        }
        .block-tip strong {
            color: var(--primary);
        }
        .block-quote {
            background: #f9f6ef;
            border-left: 5px solid var(--accent);
            padding: 18px 22px;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin: 24px 0;
            font-style: italic;
        }
        .block-quote cite {
            display: block;
            margin-top: 8px;
            font-style: normal;
            font-weight: 600;
            color: var(--primary);
        }
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
            gap: 16px;
            margin: 24px 0;
        }
        .stat-card {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            padding: 20px 16px;
            text-align: center;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
        }
        .stat-card .num {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary);
            display: block;
        }
        .stat-card .label {
            font-size: 0.9rem;
            color: var(--text-light);
        }
        .form-section {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 28px 32px;
            box-shadow: var(--shadow);
            margin: 40px 0;
            border: 1px solid var(--border);
        }
        .form-section h3 {
            margin-top: 0;
        }
        .form-group {
            margin-bottom: 16px;
        }
        .form-group label {
            display: block;
            font-weight: 600;
            margin-bottom: 4px;
            font-size: 0.95rem;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 12px 14px;
            border: 1.5px solid var(--border);
            border-radius: var(--radius-sm);
            font-size: 1rem;
            font-family: var(--font);
            transition: border 0.2s;
            background: #fafcfe;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            outline: none;
            border-color: var(--primary-light);
            box-shadow: 0 0 0 3px rgba(42, 90, 140, 0.12);
        }
        .form-group textarea {
            resize: vertical;
            min-height: 100px;
        }
        .btn {
            display: inline-block;
            background: var(--primary);
            color: #fff;
            padding: 12px 32px;
            border: none;
            border-radius: var(--radius-sm);
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
            font-family: var(--font);
        }
        .btn:hover {
            background: var(--primary-light);
            transform: translateY(-1px);
            text-decoration: none;
            color: #fff;
        }
        .btn-accent {
            background: var(--accent);
            color: #1e2a3a;
        }
        .btn-accent:hover {
            background: var(--accent-light);
            color: #1e2a3a;
        }
        .rating-stars {
            display: flex;
            gap: 6px;
            font-size: 1.6rem;
            color: #ccc;
            cursor: pointer;
            margin: 6px 0;
        }
        .rating-stars i {
            transition: color 0.2s, transform 0.15s;
        }
        .rating-stars i:hover,
        .rating-stars i.hover,
        .rating-stars i.selected {
            color: var(--accent);
            transform: scale(1.1);
        }
        .rating-stars i.selected {
            color: var(--accent);
        }
        friend-link {
            display: block;
            padding: 28px 0 16px;
            border-top: 2px solid var(--border);
            margin-top: 40px;
        }
        friend-link h3 {
            font-size: 1.2rem;
            margin-bottom: 16px;
            color: var(--primary);
        }
        friend-link ul {
            list-style: none;
            padding: 0;
            display: flex;
            flex-wrap: wrap;
            gap: 12px 20px;
        }
        friend-link li {
            margin-bottom: 0;
        }
        friend-link a {
            color: var(--primary-light);
            font-weight: 500;
        }
        friend-link a:hover {
            color: var(--accent);
        }
        .site-footer {
            background: var(--header-bg);
            color: #b0c4db;
            padding: 32px 20px 24px;
            text-align: center;
            font-size: 0.9rem;
        }
        .site-footer .container {
            max-width: var(--max-width);
        }
        .site-footer a {
            color: #cfddee;
        }
        .site-footer a:hover {
            color: var(--accent);
        }
        .site-footer .copyright {
            margin-top: 12px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 16px;
            font-size: 0.85rem;
            color: #8a9fb5;
        }
        @media (max-width: 768px) {
            .header-inner {
                padding: 10px 16px;
            }
            .my-logo {
                font-size: 1.25rem;
            }
            .nav-toggle {
                display: block;
            }
            .nav-menu {
                display: none;
                width: 100%;
                flex-direction: column;
                gap: 0;
                padding: 12px 0 4px;
                border-top: 1px solid rgba(255, 255, 255, 0.08);
                margin-top: 10px;
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu a {
                padding: 10px 0;
                border-bottom: 1px solid rgba(255, 255, 255, 0.05);
                width: 100%;
            }
            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.4rem;
            }
            h3 {
                font-size: 1.15rem;
            }
            .main-content {
                padding: 24px 0 40px;
            }
            .form-section {
                padding: 20px 18px;
            }
            .stat-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .breadcrumb-wrap {
                font-size: 0.75rem;
                padding: 8px 16px;
            }
            .rating-stars {
                font-size: 1.3rem;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 14px;
            }
            h1 {
                font-size: 1.5rem;
            }
            .stat-grid {
                grid-template-columns: 1fr;
            }
            .hero-img img {
                min-height: 150px;
            }
        }
        @media print {
            .site-header,
            .breadcrumb-wrap,
            .nav-toggle,
            .form-section .btn,
            .site-footer {
                display: none;
            }
            body {
                background: #fff;
                color: #000;
            }
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            border: 0;
        }